Propylene Aromatization on Ga-MFI Zeolites

Jinu Park; Wha Young Lee; Hyun-Sik Hahm

Korean Journal of Chemical Engineering, Vol.19, No.3, 411-416, May, 2002

DOI10.1007/BF02697148 Export Citation

Propylene Aromatization on Ga-MFI Zeolites

Jinu Park, Wha Young Lee¹, and Hyun-Sik Hahm^{1, †}

Department of Chemical Engineering, Myongji University, Yongin 449-728, Korea
¹School of Chemical Engineering, Seoul National University, Seoul 151-742, Korea

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Propylene aromatization reaction was performed on various MFI type zeolites containing Ga species. The Ga was introduced into the zeolites by substitution (Ga-MFI), ion exchange (GIZ) and physical mixing (GPZ). A commercialized zeolite (PQZSM-5) was also used for comparison. The catalysts prepared were characterized by using XRF, XPS, surface area measurement, NH3-TPD, and H2-TPR. Through the Ga substitution, the acidity of the modified catalysts was decreased, and dehydrogenation and aromatization reactions occurred more easily. The lattice Ga did not react well with hydrogen contrary to the Ga located at the outside of the lattice. It was also found that Ga-MFI catalysts facilitate alkylation reactions.

Keywords:Propylene Aromatization;Ga-MFI Zeolite;Zeolite Preparation;Ga Substitution

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[Related Articles]

[1] Bayense CR, VanderPol AJHP, van Hooff JHC, Appl. Catal., 72(1), 81 (1991)

[2] Choudhary VR, Devadas P, Appl. Catal. A: Gen., 168(1), 187 (1998)

[3] Gnep NS, Doyemet JY, Seco AM, RamoaRibeiro F, Guisnet M, Appl. Catal. A: Gen., 43(1), 155 (1988)

[4] Inui T, Yamase O, Fukuda K, Itoh A, Tarumoto J, Morinaga M, Hagiwara T, Takegami T, "Improved Methanol- and Olefin Conversion to Gasoline Using High-silica Crystals of Pentasil-Like Structure," Proceeding 8th International Congress on Catalysis, Berlin, 3, 569 (1985)

[5] Jacobs PA, Beyer HK, Valyon J, Zeolites, 1, 161 (1981)

[6] Jacobs PA, vanSanten RA, "Zeolites: Facts, Figure, Future,"(Jansen, J.C., de Ruiter, R., Biron, E. and van Bekkum, H., "Isomorphous Substitution of Si Zeolite Single Crystals. Part II. On the Boron Distribution and Coordination in [B]-ZSM-5"), Elsevier Science Publishers, Amsterdam, 679 (1989)

[7] Jia S, Wu S, Meng Z, Appl. Catal. A: Gen., 103, 259 (1993)

[8] Khodakov AY, Kustov LM, Bondarenko TN, Zeolites, 10(6), 603 (1990)

[9] Kitagawa H, Sendoda Y, Ono Y, J. Catal., 101(1), 12 (1986)

[10] Meriaudeau P, Naccache C, J. Catal., 157(2), 283 (1995)

[11] Oda Y, Sato H, "1,2,4,5-Tetramethylbenzene," Japan Patent, 61065827 (1986)

[12] Ono Y, Kitagawa H, Sendoda Y, Sekiyu Gakkaishi, 30(2), 77 (1987)

[13] Park J, Kim SB, Ha JM, Kim MS, Park HS, Hahm HS, Korean J. Chem. Eng., 18(4), 468 (2001)

[14] Wang DZ, Lu XD, Dou XY, Li WB, Yang CH, Appl. Catal., 59, 75 (1990)